Sep 21 13:07:29.592 INFO checking backoff-0.1.2 against master#f7f4c500b46603386e940f116b469c7adc043a6d for pr-54394
Sep 21 13:07:29.592 INFO running: cargo +f7f4c500b46603386e940f116b469c7adc043a6d-alt check --frozen --all --all-targets
Sep 21 13:07:29.592 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-4/pr-54394/master#f7f4c500b46603386e940f116b469c7adc043a6d:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54394/worker-4/master#f7f4c500b46603386e940f116b469c7adc043a6d:/target:rw,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home:/cargo-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "CMD=cargo +f7f4c500b46603386e940f116b469c7adc043a6d-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 21 13:07:29.831 INFO blam! 5f0d796ffd1e4928d3cc5f4317f074a4c8ec8cbc2306a7c857f4900e33c860ce
Sep 21 13:07:29.834 INFO running `"docker" "start" "-a" "5f0d796ffd1e4928d3cc5f4317f074a4c8ec8cbc2306a7c857f4900e33c860ce"`
Sep 21 13:07:31.150 INFO kablam! usermod: no changes
Sep 21 13:07:31.366 INFO kablam!     Checking backoff v0.1.2 (/source)
Sep 21 13:07:32.122 INFO kablam! warning: unknown lint: `needless_pass_by_value`
Sep 21 13:07:32.122 INFO kablam!   --> examples/permanent_error.rs:10:9
Sep 21 13:07:32.122 INFO kablam!    |
Sep 21 13:07:32.123 INFO kablam! 10 | #[allow(needless_pass_by_value)]
Sep 21 13:07:32.123 INFO kablam!    |         ^^^^^^^^^^^^^^^^^^^^^^
Sep 21 13:07:32.123 INFO kablam!    |
Sep 21 13:07:32.124 INFO kablam!    = note: #[warn(unknown_lints)] on by default
Sep 21 13:07:32.124 INFO kablam! 
Sep 21 13:07:35.245 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 4.08s
Sep 21 13:07:35.266 INFO kablam! su: No module specific data is present
Sep 21 13:07:36.170 INFO running `"docker" "rm" "-f" "5f0d796ffd1e4928d3cc5f4317f074a4c8ec8cbc2306a7c857f4900e33c860ce"`
Sep 21 13:07:36.276 INFO blam! 5f0d796ffd1e4928d3cc5f4317f074a4c8ec8cbc2306a7c857f4900e33c860ce